Well Mike, they did and they didn't. Adam Marelli adopted one of their small 'tannin' cartridge shoulder bags years ago (the early version with the canvas rather than leather flap). That's the one i ultimately acquired. But they did make a special private-run camera version for him with several modifications. Adam later went on to have other makers (including Chapman) build a bag for him.
It's just an appropriately-sized generic bag. I got mine at least 10 years ago, and the maker is an obscure small outfit in Osaka that got no further notice in the west & Adam M isn't a widely-known photographer.
The bag is lighter & much softer than the similarly-sized
Filson cartridge bag.
The Chapman version is a far cry from the small, light, unstructured "
Slow Tools" original.....& $400 USD
https://www.youtube.com/watch?v=dVu0PDKuBKc
https://amworkshops.com/tips-techniques/introducing-the-amarelli-x-chapman-camera-bag
https://www.pinterest.ca/plongchamps/leica-bag-slow-tools/